Measuring-pump



(No Moaei.) 2 sheets-sheet 1. H. E. MARCHAND.

MBASURING PUMP.

No. 327,890. Patented Oct. 6, 1885 jfenyydlwcZaZ/a im 28W y@ N. PETERS Phomuxhugmpher, wnshnglm. D. C.

(No Model.) 2 Sheets-Sheet 2.' H. E. MARCHAND.

MEASURING PUMP.

No. 327,890. Patented oct. 6, 1885y Inma/i020, HenyZW/aaiul,

UNITED STATES PATENT OEEICE.

HENRY E. MARCHAND, OF ALLEGHENY, PENNSYLVANIA.

MEASURlNG-PUMP.

SPECIFICATION forming part of Letters Patent No. 327,890, dated October 6, 1885.

Application liled November 13, 1884. Serial No.147,91F. (No model.)

To all whom t may concern,.-

Be it known that I, HENRY E. MARCHAND, a citizen of the United States, residing at Allegheny city, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Measuring- Pumps, of which the following is a specification.

My invention relates to measuring-pumps of the class employed for drawing oil from the tanks in which it is contained, and the purpose thereofI is to simplify the construction, reduce the cost of manufacture, improve the operation of this class of apparatus, and to provide a single-acting pump which will thro w a continuous stream of oil.

My invention consists of the several novel features of construction and combinations of parts, hereinafter fully described, and definitely pointed out in the claims annexed to this specification.

Referring to the drawings forming part of this application, Figure 1 is a vertical section taken centrally through the pump-cylinder and adjoining parts. Fig. 2 is a horizontal section taken in the plane x x, Fig. 1. Fig. 3 is a horizontal section of the pistoncoupling detached. Fig. 4 is a central longitudinal section of a portion of the outlet-pipe with its contained check-valve.

In the said drawings,the referencenumeral 1 denotes the pump-cylinder, which is constructed with an open top surrounded by a collar or flange, 2, to which is securely bolted a dome-shaped cover, 3,which forms a liquidchamber having a central opening, 4, to which the goose-neck or outlet 5 is applied.

Vithin the cylinder 1 is placed a piston, 6, having an elastic packing-ring, 7, contained within a chamber cut upon the periphery of the pistonhead,and provided with an annular flange, 8, rising from its upper side. Upon this flange is secured a coupling intermediate between the piston and the piston-rod 9. This coupling is composed of a ring, 10, resting upon the flange 8, and having a iiange, 11, which fits within said flange.

Radial arms are cast integral with the ring 10, forming aspider,12, whereupon are mounted ears or lugs 13, between which the end of the actuating-rod 9 is pivoted. The other end of said rod is perforated to receive a wrist-pin, 14, formed upon a crankearm, 15, which is carried by a crank-spindle, 16, the latter being journaled in an arbor, 17, the axis of the spindle and that of the arbor being parallel, but not coincident, the construction being substantially the same as that shown in Letters Patent No. 287,697, granted to me the 30th day of October, 1883.

The arbor 17 has bearing in a box, 18, formed upon one side of the dome 3, and provided with a detachable cap, 19, which forms, in connection with the outer end of said box, a stung chamber containing packing 19. A collar, 20, is formed upon the arbor 17 to limit its inward movement, and the packing or stufng lies against said collar and holds it closely in place. In the outer end of the spindle 16 is formed a channel or groove, 21, which receives the end of a set-screw, 22, passing through a threaded aperture in the arbor 17, and through the sleeve 23 upon the end of the crank 24. This construction prevents the set-screw from burring the spindle when it is set up against it.

The lower solid end of the cylinder is turned off to form a neck, 25, which enters a collar, 26, surrounding an opening in a plate, 27, upon which the piston is mounted and secured by a setscrew, 28, passing through a boss upon said collar. The plate 27 is provided with legs 29, of any suitable form,and forms a stand for the pump, a iiange, 30, being cast or otherwise formed upon the periphery of the plate to catch the drip or leakage from above.

In the lower end of the cylinder 1 is formed a central opening, 31, which receives the outletpipe 32. This opening communicates with a central aperture in the piston 6, within which is seated a puppet-valve, 33, projecting below the piston and into an enlargement of the opening 31. This valve has a stem, 34,which moves in an aperture,35, formed at the juncture of the radial arms 12, and by which the valve is guided.

The eduction-pipe 32 is provided below the cylinder with a check-valve composed of two separate disks, 36 and 37, mounted upon a stem, 38, and seating upon annular nanges 36 and 37, formed upon the interior of the pipe. The upper valve-disk,36,is the larger,

IOO

the lower one being of such size that it will pass through the seat 36 to permit the removal of the valve. Wire screens 39 are placed above and below the valve, and the ends of the valve-stem pass through said screens and guide the valve in its movement, causing it to seat accurately.

The top or stand plate, 27, which is preferably made of circular form, has an extension, 27, upon which is mounted a drip-cup, 40, havinganinletordripreceivingpipe,4l,which leads back to the tank. The drip-cup is fastened in place by a set-screw, 42, and may be provided with a screen to prevent the passage of foreign substances into the tank beneath. Thesocket or opening which receives the drip-cup may also be provided with apertures 43, through which the oil leaking from the packings and retained by the ilange 30 may enter the inlet-pipe 4l and return to the tank.

The construction shown may be varied considerably without departing from my invention. For example, the crank-spindle may, instead of having a groove, 2l, be turned down; or diminished or, on the other hand, the chamber in the arbor in which the spindle has bearing may be enlarged at the point where the set-screw engages, the crank-spindle remaining of equal diameter throughout. In either case the same result-viz., preventing the crank-spindle from being obstructed in rotary adjustment by the metal burring up against the arbor under the set-screw-is accomplished.

This pump, though a single-acting pump, will throw a steady and continuous stream, produced by the accumulation in the reservoir 3, in excess of the discharge through the outlet 5.

By locating the check-valve in the pipe leading to the pump-cylinder I am able to use a single valve only in the pump; and, moreover, the checlcvalve, being atsome little distance from the piston and cylinder, the oil above the checkvalve makes an elastic cushion for the piston, which mate'riallypromotes the operation.

I do not here claim the construction of table or stand for supporting a pump cylinder or case and a drip-cup; nor do I claim the peculiar manner of constructing and supporting a pump cylinder or case on the table; nor do I claim a pump-cylinder having an air and fluid reservoir with an outlet leading therefrom, combined with a drip-cup communicating with a pipe to return oil-drippings back to an oil-tank. Such features are embodied and claimed in a separate application for Letters Patent tiled by me March 10, 1885, Serial No. 158,380.

l. In a single-acting measuring-pump, the combination,with the cylinder having an airreservoir, of a valve piston, an eduction-pipe having annular valve-seats and communicating with said cylinder, and a double check-valve in said pipe consisting of a large and a small valve-disk mounted upon the same valvestem, the ends of the stem passing through and being guided by wire screens in the pipe, substantially as described.

2. In a measuringpump, the combination, with the outlet-pipe leading to the pump-cyh inder, of a check-valve composed of two imperforate disks, the upper a large and the lower a small one, both mounted upon the same stem and engaging with the upper surfaces of annular valve-seats projecting from the inner surface of the pipe, said valves being lifted from theirseats by the lifting of the 8o iiuid through the outlet-pipe, substantially as described.

In testimony whereof I aX my signature in presence of two witnesses.

HENRY E. MARCHAND. Vitnesses:

D. E. DAvIs, HARRY Davis. 

